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**1. General Description**
The QK1343 CNC Oil Pipe Thread Lathe is a high-performance machine designed for turning the ends of various types of pipes. It also functions as a general-purpose lathe, making it ideal for a wide range of industrial applications. The machine is equipped with a FANUC 0i mate CNC control system and a full-digital AC servo system, ensuring precision, reliability, and ease of operation.
**2. Main Components**
**2.1 Machine Base**
The machine base, headstock frame, carriage case, cross slide, and tool post are all made from high-strength HT-250 grey cast iron using resin sand casting. These components undergo three stages of aging treatment, including over six months of natural aging, to eliminate internal stress and ensure long-term accuracy. The bed ways are quenched using supersonic frequency induction and then precision ground. PTFE anti-abrasion belts are applied to reduce friction and improve longevity.
**2.2 Headstock**
The headstock is driven by a 37 kW AC variable frequency motor, which controls the spindle through narrow V-belts and a speed-changing mechanism. The spindle operates in nine steps and can run at variable speeds between 6–205 RPM.
**2.3 Feeding Movements**
Both X-axis (cross feeding) and Z-axis (longitudinal feeding) are driven by independent AC servo motors via synchronous toothed belts and precision ball screw pairs. This allows for smooth and accurate movement across both axes. The system uses semi-closed loop control with encoders for improved performance.
**2.4 NC Turret**
A 4-position NC turret is installed on the machine, offering high precision with a repeatability of 0.005 mm, stable rotation, and simple operation.
**2.5 Tailstock**
The tailstock features high rigidity and convenient operation. It includes an internally mounted center and a quill diameter of 140 mm, ensuring strong support and high rotational accuracy.
**2.6 Cooling System**
A dedicated coolant reservoir is located beneath the machine. Coolant is pumped to the cutting area through pipelines, improving cutting conditions and prolonging tool life.
**2.7 Lubrication System**
A central automatic lubrication device periodically lubricates the ball screw pairs and bed ways, ensuring smooth operation and reducing wear.
**2.8 Hydraulic System**
The hydraulic system provides lubrication for the headstock and facilitates automatic gear shifting. Key components are sourced from Taiwan, ensuring reliable performance and easy maintenance.
**2.9 Auxiliary Supporting**
An optional auxiliary support device is available to enhance the machine's versatility.
**3. Machine Performance Accuracy**
- Positioning Accuracy, X-Axis: 0.03 mm / 1000 mm
- Positioning Accuracy, Z-Axis: 0.04 mm / 1000 mm
- Repeatability, X-Axis: 0.012 mm
- Repeatability, Z-Axis: 0.016 mm
- Dimension Tolerance: IT 7 Grade
- Surface Roughness, Finish Cylindrical Turning: Ra3.2 μm
- Roundness, Finish Cylindrical Turning: 0.02 mm
- Cylindricity, Finish Cylindrical Turning: 0.025 mm / 300 mm
- Flatness, Finish Face Turning: 0.025 mm / 300 mm
- Thread Pitch Tolerance: 0.015 mm / 60 mm
Model
QK1343
Bed width
750mm
Turning diameter
over bed (max.)1000mm
Max. diameter of
pipe (manual chuck)426mm
Turning length (Max.)
1500mm
Spindle bore
440mm
Spindle speed steps
9 steps
Range of spindle speed
5~200
r/min
Tool post
Vertical 4-position
Indexing time(s)
2.4
Main motor (kw)
22kw
CNC Oil Pipe Thread Lathe Machine Spindle Bore440mm (QK1343)
**Product Specifications**
Model NO.: QK1343
Automatic Grade: Automatic
Setting Mode: Floor-type
Precision: High Precision
Certification: CE, RoHS, ISO 9001
Condition: New
Spindle Bore: 440mm
Trademark: WELLON
Specification: CE ISO9001
Origin: China
HS Code: 84597000